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1.
Analyses of responses from a clinical sample of 120 patients (primarily schizophrenics) and from 158 college students to the Cognitive Slippage Scale, a scale designed by Miers and Raulin to identify speech deficits and confused thinking in schizophrenic and schizotypal personality disorders showed high internal reliability; Cronbach's coefficients alpha were .89 and .86 in the clinical and college student samples, respectively. The mean scale scores significantly differentiated the two samples. Also, change scores over 4 wk. showed adequate stability for both samples. Item analysis indicated Items 11, 20, 21, and 28 may not reliably discriminate between schizophrenic and college student samples. Over-all, these preliminary results are consistent with the reliability and validity of the scale. 相似文献
2.
On the transmission of partial information: inferences from movement-related brain potentials. 总被引:1,自引:0,他引:1
A Osman T R Bashore M G Coles E Donchin D E Meyer 《Journal of experimental psychology. Human perception and performance》1992,18(1):217-232
Results are reported from a new paradigm that uses movement-related brain potentials to detect response preparation based on partial information. The paradigm uses a hybrid choice-reaction go/nogo procedure in which decisions about response hand and whether to respond are based on separate stimulus attributes. A lateral asymmetry in the movement-related brain potential was found on nogo trials without overt movement. The direction of this asymmetry depended primarily on the signaled response hand rather than on properties of the stimulus. When the asymmetry first appeared was influenced by the time required to select the signaled hand, and when it began to differ on go and nogo trials was influenced by the time to decide whether to respond. These findings indicate that both stimulus attributes were processed in parallel and that the asymmetry reflected preparation of the response hand that began before the go/nogo decision was completed. 相似文献
3.
Structure and process in semantic memory: new evidence based on speed-accuracy decomposition 总被引:1,自引:0,他引:1
Reaction-time and accuracy data obtained from studies of sentence verification have not been rich enough to answer certain important theoretical questions about structures and processes in human semantic memory. However, a new technique called speed-accuracy decomposition (Meyer, Irwin, Osman, & Kounios, 1986) may help solve this problem. The technique allows intermediate products of sentence verification to be analyzed more precisely. Three experiments with speed-accuracy decomposition indicate that verification processes produce useful partial information before they are completed. Such information appears to accumulate continuously at a rate whose magnitude depends on the degree of relatedness between semantic categories. This outcome is consistent with continuous computational (e.g., semantic-feature comparison) models of semantic memory. An analysis of reaction-time minima suggests that a discrete all-or-none search process may also contribute at least occasionally to sentence verification. Further details regarding the nature of these processes and the memory structures on which they operate can be inferred from additional results obtained through speed-accuracy decomposition. 相似文献
4.
Recent work has sought to use the time at which the Lateralized Readiness Potential (LRP) first develops (LRP onset) as a temporal landmark to bisect experimental effects on reaction time (RT). Many studies have found experimental effects on the time between the signal and LRP onset, but few have found effects on the time between LRP onset and RT (LRP-RT interval). The primary goal of this study was to produce an effect on the LRP-RT interval. We employed precuing, a manipulation likely to influence motor-programming processes at the end of the RT interval. Subjects performed a 4-alternative choice-RT task in which a signal prompted a button-press with the index or middle finger on the left or right hand. Precues preceded the signals and were either informative, reducing the set of response alternatives from four to two, or uninformative. Besides RT and LRP, we also measured electromyographic (EMG) activity and the P300 ERP component. RT, P300 latency, and the interval between the signal and LRP onset were all shorter with informative than uninformative precues, but the timing of EMG activity relative to RT remained the same. Most importantly, precuing affected the LRP-RT interval. Implications for bisecting RT with LRPs and the identity of processes affected by precuing are discussed. 相似文献
5.
Eli Osman Pi -Fong Lin Tzuo Huan -Yuan Tzuo 《Attention, perception & psychophysics》1981,30(4):372-374
The threshold of a brief signal temporally centered in a noise masker first increases and then decreases as the masker is increased in duration. We discuss two explanations for this “over-shoot” phenomenon which consider the role of peaks of an exponentially weighted sliding integrator. One such explanation takes into account the finding that the steepness of the psychometric function continues to increase monotonically as its location moves first right and then left. 相似文献
6.
The Reasons for Living Inventory: psychometric properties 总被引:1,自引:0,他引:1
The test-retest reliability, internal consistency reliability, normative, and item analysis data of the Reasons for Living Inventory were investigated in a sample of 116 college students. The inventory has six subscales, each of which assesses a category of adaptive beliefs and expectations considered reasons for not committing suicide. The inventory was administered twice, with a 3-week interval between testings. Test-retest coefficients for the men, women, and total sample were moderate to high. The alpha coefficients and item-total correlations for the subscales and the total inventory provided strong support for internal consistency. 26 items were consistently endorsed by 30% or more of our total sample as "extremely important," while only four were suggested as "not at all important" reasons for not committing suicide. 相似文献
7.
Koc Muharrem Zorbaz Osman Demirtas-Zorbaz Selen 《Social Psychology of Education》2020,23(5):1149-1171
Social Psychology of Education - The purpose of this study is to determine the factors relating to school dropout from the perspective of dropout students, their teachers, and their parents. It... 相似文献
8.
9.
Antonio F. Garcia Tiffany Berzins Melina Acosta Saifa Pirani Augustine Osman 《Journal of personality assessment》2018,100(3):321-332
Three studies examining the factor structure and psychometric properties of the Anxiety Depression Distress Inventory–27 (ADDI–27) extended the initial instrument development studies for this recently introduced inventory. The ADDI–27 is an empirically derived short form of the Mood and Anxiety Questionaire–90 (MASQ–90) comprising three scales: Positive Affect, Somatic Anxiety, and General Distress. The main objectives of Study 1 (N = 700) were to examine the factor structure of the ADDI–27 and its measurement invariance across gender at the item level. The objective of Study 2 (N = 538) was to examine evidence for the convergent and discriminant validity of scores on the ADDI–27. The objective of Study 3 (N = 240) was to assess further evidence for the nomological network and convergent and discriminant validity of the ADDI–27 scores. Results of exploratory structural equation modeling yielded strong support for a 3-factor model, with approximate fit indexes meeting or exceeding the conventional cutoffs. With p ≤ .001 as the criterion for detecting noninvariance, results of measurement invariance analysis suggested that all of the ADDI–27 items were invariant across gender. Results of multivariate validity analyses across 2 studies provided support for the convergent and discriminant validity of scores on the ADDI–27 scales. 相似文献
10.
A semi‐structured interview assessing the presence and characteristics of spontaneous appearance‐related images was designed and administered. A total of 18 patients with body dysmorphic disorder (BDD) and 18 normal controls took part. The BDD patients were found to have spontaneously occurring appearance‐related images that were significantly more negative, recurrent, and viewed from an observer perspective than control participants. These images were more vivid and detailed and typically involved visual and organic (internal body) sensations. The study also found that BDD images were linked to early stressful memories, and that images were more likely than verbal thoughts to be linked to these memories. Implications for theory and clinical practice are discussed. 相似文献